Analysis on Dynamic Failure Behaviors of Steel Double-Layer Grids Supported by Circumjacent Steel Columns Used in a Gymnasium with the Function of Earthquake Victims Shelter under Disaster Earthquake

Abstract:

In this paper, the elasto-plastic dynamic analysis on dynamic failure behaviors of steel double-layer grids supported by circumjacent steel columns used in a gymnasium with the function of earthquake victims shelter under disaster earthquake is carried out under EL-centro wave with SAP2000, and the appraisal results on their anti-failure performances are presented under strong earthquake action based on the plastic-hinge theory. In the analyses, the geometric and material nonlinear effects are considered simultaneously based on the plastic-hinge theory. The plastic development level of the rod, the deformed shape and the failure type and the ductility are estimated by plastic hinge principle. The results show that: Along with the growth of the seismic wave peak acceleration (shorted as PGA), structure developed from elastic into the elastic-plastic. The failure model of the structure under the earthquake wave action is due to overall elasto-plastic instability of double-layer grids. When the structure reached its failure critical limit, the development of the plastic hinges is sufficient and 24.5% of the rods enter into their plastic stage; The ratio of its maximal failure node vertical displacement and its short span is 1/51, The ratio of its maximal failure node horizontal displacement and its columns is 1/49; Its critical failure PGA is 771gal, which is 1.9 times more than the official seismic fortification level of 8 degree (major earthquake, 0.2g) and can be served as earthquake victims shelter in the area of 8 degree seismic fortification; Its displacement ductility coefficient is 7.6,which shows the structure owns good energy dissipation capacity.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 1616-1619
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.1616
• Online since: November 2012
• Authors: Xi Zhao, Hai Wang Li, Jing Liu, Yu Ma
• Keywords: Elasto-Plastic Dynamic Response, Plastic Hinge, Seismic Performance, Steel Double-Layer Grids, Strong Earthquake Action

References

[1] H.W. Li, H.S. Zhao, Y.J. Zhao: Study on Planning for the Indoor-earthquake-shelter in City and Town. (Advanced Science Letters), USA, 2011,Vol. 4, p.2654–2665.

DOI: 10.1166/asl.2011.1755

[2] Civil King Software Technology Co., Ltd. China institute of Building Standard Design & Research. Usage Guide to Structure Analysis Program SAP2000 Chinese Edition [CP] (China communications press, China, 2006),p.460.

[3] JGJ7-2010 Technical specification for space frame structures [S]. (China architecture & building press, Beijing, 2010)

[4] GB50011-2010(2010 edition) Code for seismic design of buildings[S]. (China architecture & building press, Beijing, 2010).

[5] FEM 356 the Seismic Rehabilitation of Buildings[S]. Federal Emergency Management Agency,2000.

[6] S.S. Zhao and C. Xin: Dynamic stability of grid structure [M] (Beijing, Science Press,1999).

[7] H.W. Li, J.X. Li, F. Zhi, F. Ma and D.Q. Qin: Proceedings of the 6th International Conference on Computation of Shell and Spatial Structures IASS-IACM (Cornell University, Ithaca, NY, USA, May 28-31, 2008).

DOI: 10.1016/j.engstruct.2007.07.002